WO2020052666A1 - Procédé et appareil de communication - Google Patents

Procédé et appareil de communication Download PDF

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Publication number
WO2020052666A1
WO2020052666A1 PCT/CN2019/105777 CN2019105777W WO2020052666A1 WO 2020052666 A1 WO2020052666 A1 WO 2020052666A1 CN 2019105777 W CN2019105777 W CN 2019105777W WO 2020052666 A1 WO2020052666 A1 WO 2020052666A1
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WIPO (PCT)
Prior art keywords
information
indication information
codeword
indication
field
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PCT/CN2019/105777
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English (en)
Chinese (zh)
Inventor
刘显达
刘鹍鹏
张旭
张雷鸣
高翔
周永行
Original Assignee
华为技术有限公司
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Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201980060138.1A priority Critical patent/CN112703696A/zh
Priority to EP19858801.4A priority patent/EP3846370B1/fr
Publication of WO2020052666A1 publication Critical patent/WO2020052666A1/fr
Priority to US17/200,359 priority patent/US11889513B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1273—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of downlink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
    • H04L1/0025—Transmission of mode-switching indication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
    • H04L1/0053—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables specially adapted for power saving
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0072—Error control for data other than payload data, e.g. control data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
    • H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
    • H04L1/0013—Rate matching, e.g. puncturing or repetition of code symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

Definitions

  • the present invention relates to the field of wireless communication technologies, and in particular, to a communication method and device.
  • terminal equipment In the downlink transmission of the new radio access technology (NR) system of the 3rd Generation Partnership Project (3GPP), terminal equipment (user equipment) (UE) can adopt multi-site cooperative transmission (The coordinated multiple points transmission / reception (CoMP) mode communicates with multiple network devices (such as base stations) at the same time. These multiple network devices form a collaboration set, and each network device in the collaboration set can exchange collaboration strategy information to achieve cooperative transmission. the goal of.
  • NR new radio access technology
  • 3GPP 3rd Generation Partnership Project
  • a serving base station in the coordination set which is used for data communication scheduling decision of the UE, and the time-frequency resources of the UE's control channel and data channel are determined according to the scheduling decision, and the physical downlink control channel (PDCCH) It sends downlink control information (downlink control information) during transmission, and sends data in physical uplink shared channel (PUSCH) / physical downlink shared channel (PDSCH).
  • the remaining base stations except the serving base station in the cooperative set are called cooperative base stations, and are used to communicate with the UE according to the scheduling decision of the serving base station, such as sending DCI in the PDCCH and sending data in PUSCH / PDSCH according to the scheduling decision of the serving base station.
  • the base station transmits downlink data in the form of a codeword (codeword) in the PDSCH.
  • codeword corresponds to an independent modulation and coding method, and each codeword corresponds to an independent data transmission layer.
  • the PDSCH can be scheduled using one DCI indication or two DCI indications.
  • the PDSCH scheduling uses a DCI indication, as shown in Figure 1, the left base station can serve as the serving base station to make UE scheduling decisions and send DCI.
  • the DCI may include modulation coding in the form of one codeword or two codewords.
  • Time-frequency resource allocation indication and transmission mode indication of downlink data If the PDSCH scheduling uses two DCI indications, as shown in FIG. 2, the two base stations may respectively send one DCI, and each DCI corresponds to a time-frequency resource allocation indication and a transmission mode indication of at least one codeword.
  • the UE does not notify the UE of the number of DCIs used to schedule the PDSCH. Therefore, the UE always needs to blindly detect two DCIs until the maximum number of blind detections is reached, thereby increasing the blind detection complexity of the UE and the blind detection DCI. Consumed power. For this reason, how to reduce the complexity of UE blind detection of DCI is an urgent problem to be solved.
  • the embodiments of the present application provide a communication method and device, so that a terminal device terminates an unnecessary blind detection process in advance, and reduces the blind detection complexity and detection power consumption of the terminal device.
  • an embodiment of the present application provides a communication method.
  • the method includes: a first network device generates first indication information; the first indication information is used to indicate a first downlink resource, and within a first time unit Whether there is second indication information, the second indication information is used to indicate a second downlink resource; the first downlink resource and the second downlink resource are used to carry downlink data; the first network device is in the Sending the first indication information in a first time unit.
  • an embodiment of the present application provides another communication method.
  • the method includes: the terminal device detects first indication information at a first time unit; the first indication information is used to indicate a first downlink resource, and Whether there is second indication information in a time unit, the second indication information is used to indicate a second downlink resource; the first downlink resource and the second downlink resource are used to carry downlink data; if the terminal device It is detected that the first indication information indicates that the second indication information does not exist within the first time unit, and the terminal device stops detecting the second indication information within the first time unit.
  • the terminal device may terminate the blind detection process for the second instruction information in advance, thereby effectively reducing the complexity of the blind detection of the terminal device. It supports terminal equipment to perform fast PDSCH demodulation and avoids the technical problem of large power consumption caused by blind detection of two indication information in the prior art.
  • the first network device sends the first time information in the first time unit. Two indication information; wherein the second indication information is used to indicate that the first indication information exists in the first time unit. Accordingly, the terminal device also detects the second indication information within the first time unit.
  • the first instruction information will indicate that the second instruction information exists in the first time unit. Accordingly, the second instruction information also indicates that the first instruction information exists in the first time unit. Because the sequence of the UE blindly detecting the first indication information and the second indication information is unknown to the network device, no matter which of the first indication information and the second indication information is detected by the terminal device, the detection is performed first.
  • the received instruction information can always indicate the existence of another instruction information to prompt the terminal device to detect two instructions. In this way, the terminal device can terminate the second instruction information in advance when the first instruction information indicates that the second instruction information does not exist. The detection of instruction information reduces the actual number of blind detections.
  • the terminal device detects the first indication information and the second indication information within a first time unit according to search space configuration (Search Space) information of the first indication information and the second indication information. Assuming that the terminal device first detects any one of the first instruction information and the second instruction information, the terminal device may determine whether there is a difference from the first instruction information according to any of the detected first instruction information and the second instruction information. And another indication information of any one of the second indication information, when there is another indication information different from any of the first indication information and the second indication information, the terminal device continues according to the corresponding search space configuration information In the process of detecting the indication information, when there is no other indication information different from any of the first indication information and the second indication information, the terminal device stops the process of detecting the indication information.
  • search space configuration Search Space
  • the first indication information indicates that “whether the second indication information exists in the first time unit” may have multiple possible implementation manners.
  • the first indication information includes at least two codeword information fields, and each codeword information field in the at least two codeword information fields is used to indicate whether a corresponding codeword is Enable; if all codewords corresponding to at least two codeword information fields in the first indication information are enabled, the first indication information is used to indicate that the second indication information does not exist; if the first indication information The codeword portions corresponding to at least two codeword information fields in the indication information are enabled, and the first indication information is used to indicate the existence of the second indication information.
  • whether the second instruction information exists in the first time unit can be indicated according to the activation status of the codeword corresponding to the codeword information field in the first instruction information, thereby effectively avoiding additional information brought by the addition of fields in the instruction information. It reduces the overhead and reduces the complexity of blind detection of the terminal equipment.
  • the downlink data transmission adopts a transmission mode in which a single base station transmits two codewords, it only needs to detect and decode 1 DCI without waiting for full detection and decoding.
  • the information carried by the two DCIs can support terminal equipment for fast data demodulation.
  • the first indication information includes a demodulation reference signal DMRS port indication field and at least two codeword information fields, and each codeword information in the at least two codeword information fields A field is used to indicate whether the corresponding codeword is enabled; if at least two codewords corresponding to the codeword information field in the first indication information are all enabled, and a status value of the DMRS port indication field is located in a first preset Within the range, the first indication information is used to indicate the existence of the second indication information; if at least two codeword information fields corresponding to the codeword information fields in the first indication information are enabled, and the DMRS If the status value of the port indication field is within a second preset range, the first indication information is used to indicate that the second indication information does not exist; if at least two pieces of first codeword information in the first indication information If a part of the codeword corresponding to the field is enabled, the second indication information is used to indicate that the first indication information does not exist.
  • the codeword corresponding to the codeword information field in the first indication information can be used to indicate whether the second indication information exists within the first time unit in combination with the status value indicated by the DMRS port indication field, thereby effectively avoiding the
  • the additional fields in the instruction information bring additional signaling overhead and reduce the blind detection complexity of the terminal device.
  • the downlink data transmission adopts a transmission mode in which a single base station transmits two codewords, it only needs to detect and decode. One DCI without waiting for complete detection and decoding to obtain the information carried by the two DCIs, thereby enabling terminal equipment to perform fast data demodulation.
  • the number of DMRS ports corresponding to the status value of the DMRS port indication field within the first preset range Is less than or equal to the first threshold, the number of DMRS ports corresponding to the status value of the DMRS port indication field within the second preset range is greater than the first threshold, and thus can support 1 DCI Indicate a transmission mode in which a single base station transmits 1 or 2 codewords and 2 DCI indicate a transmission mode in which two base stations transmit at least 2 codewords.
  • the device performs blind detection of 2 DCIs, reduces the complexity of the blind detection of the terminal device, and supports the terminal device to perform fast data demodulation, and the above-mentioned transmission mode can be dynamically switched.
  • the number of DMRS ports corresponding to the status value of the DMRS port indication field within the first preset range is less than or equal to the first The threshold value, and the DMRS port number corresponding to the status value corresponds to the same CDM group.
  • each codeword information field in the at least two codeword information fields includes: a modulation and coding strategy MCS field and a redundant version RV field; a status value of the MCS field is located in a third preset value.
  • the codeword information field is used to indicate that the codeword corresponding to the codeword information field is not enabled, otherwise the codeword information field corresponds to the The codeword is enabled.
  • the first indication information is used to indicate that the first Two indication information; if a mask of a CRC bit corresponding to the first indication information is a second scrambling sequence, the first indication information is used to indicate that the second indication information does not exist.
  • the mask of the CRC bit corresponding to the first indication information can be used to carry whether the second indication information exists in the first time unit, thereby effectively avoiding additional signaling overhead caused by adding fields to the indication information, and reducing the terminal. Complexity of blind detection of equipment.
  • the first indication information may be used to indicate that the second indication information does not exist, and the first information format is A format that has the least number of bits among a plurality of DCI formats for scheduling downlink data transmission; and / or, if the first indication information meets a second information format, the first indication information may be used to indicate the presence of the second indication Information; the second information format is a format in which the number of bits in the plurality of DCI formats used for scheduling downlink data transmission is greater than the first information format.
  • the presence of the second instruction information in the first time unit can be indicated by the information format satisfied by the first instruction information, thereby effectively avoiding additional signaling overhead caused by the addition of fields in the instruction information and reducing the blindness of the terminal device. Detection complexity.
  • the second indication information indicates that “the first indication information exists in the first time unit” may have multiple possible implementation manners.
  • the second indication information includes at least two codeword information fields, and each codeword information field in the at least two codeword information fields is used to indicate whether a corresponding codeword is Enable; if at least two codeword portions corresponding to the codeword information fields in the second indication information are enabled, the second indication information is used to indicate the existence of the first indication information.
  • the presence of the first indication information in the first time unit can be indicated according to the activation of the codeword corresponding to the codeword information field in the second indication information, thereby effectively avoiding additional signaling brought by the addition of fields in the indication information
  • the overhead reduces the complexity of blind detection of the terminal equipment.
  • the downlink data transmission adopts a transmission mode in which a single base station transmits two codewords, it only needs to detect and decode 1 DCI without waiting for complete detection and decoding.
  • the information carried by each DCI can support terminal equipment for fast data demodulation.
  • the second indication information includes a demodulation reference signal DMRS port indication field and at least two codeword information fields, and each codeword information in the at least two codeword information fields The field is used to indicate whether the corresponding codeword is enabled; if at least two codewords corresponding to the codeword information field in the second indication information are all enabled, and the status value of the DMRS port indication field is located in the first preset Within the range, the second instruction information is used to indicate the existence of the first instruction information.
  • the downlink data transmission adopts a transmission mode in which a single base station transmits two codewords, it only needs to detect and decode One DCI does not need to wait for complete detection and decoding to obtain the information carried by the two DCIs, which can support terminal equipment for fast data demodulation.
  • the number of DMRS ports corresponding to the status value of the DMRS port indication field within the first preset range is greater than the first threshold value, and thus can support 1 DCI indication
  • a single base station transmits one or two codeword transmission modes and two DCI indicate that two base stations transmit at least two codeword transmission modes. In this way, only two base stations need at least two codeword transmission modes to require terminal equipment. Perform 2 blind detection of DCI, reduce the complexity of blind detection of terminal equipment and support terminal equipment for fast data demodulation.
  • the number of DMRS ports corresponding to the status value of the DMRS port indication field within the first preset range is less than or equal to the first The threshold value, and the DMRS port number corresponding to the status value corresponds to the same CDM group.
  • each codeword information field in the at least two codeword information fields includes: a modulation and coding strategy MCS field and a redundant version RV field; a status value of the MCS field is located in a third preset value.
  • the codeword information field is used to indicate that the codeword corresponding to the codeword information field is not enabled, otherwise the codeword information field corresponds to the The codeword is enabled.
  • the first indication information is used to indicate that the first Two instructions.
  • the first indication information can be carried in the first time unit through the mask of the CRC bit corresponding to the second indication information, thereby effectively avoiding additional signaling overhead caused by the addition of fields in the indication information and reducing the terminal device. Complexity of blind detection.
  • the second indication information may be used to indicate the existence of the first indication information, and the second information format is used for
  • the number of bits in the plurality of DCI formats for scheduling downlink data transmission is larger than the first information format, and the first information format is a format with the least number of bits in the plurality of DCI formats for scheduling downlink data transmission.
  • the first indication information and the second indication information both include a first field
  • the first network device may further send third indication information, where the third indication information is used for Indicates that the first field in the first indication information is the same as the content indicated by the first field in the second indication information.
  • the terminal device may further receive third instruction information; the terminal device quickly decodes the first instruction information and the second instruction information according to the first field, or checks the first instruction Correctness of the information and the second indication information decoding.
  • an embodiment of the present application provides a network device that has a function of implementing the network device in the first aspect or any possible design of the first aspect, and the function may be implemented by hardware or by The hardware executes the corresponding software implementation, and the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the network device includes a processing module and a transceiver module, and the processing module is configured to support the network device to execute the corresponding first aspect or any one of the first aspect of the design.
  • the transceiver module is configured to support communication between the network device and other communication devices.
  • the network device may further include a storage module, which is coupled to the processing module and stores program instructions and data necessary for the network device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • an embodiment of the present application provides a terminal device that has a function of implementing the terminal device in the second aspect or any one of the possible designs of the second aspect, and the function may be implemented by hardware or by The hardware executes the corresponding software implementation, and the hardware or software includes one or more modules corresponding to the above functions.
  • the structure of the terminal device includes a processing module and a transceiver module, and the processing module is configured to support the terminal device to execute the corresponding second aspect or any one of the second aspect of the design.
  • the transceiver module is used to support communication between the terminal device and other communication devices.
  • the terminal device may further include a storage module, which is coupled to the processing module and stores program instructions and data necessary for the terminal device.
  • the processing module may be a processor
  • the communication module may be a transceiver
  • the storage module may be a memory.
  • an embodiment of the present application provides a chip that is coupled to a memory and is configured to read and execute a software program stored in the memory to implement any one of the possible designs in the first aspect. Method, or a method in any of the possible designs to implement the second aspect.
  • an embodiment of the present application provides a computer-readable storage medium, where the computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute the foregoing first
  • the method in any one of the possible designs of the aspect, or the method in any one of the possible designs of the second aspect described above.
  • an embodiment of the present application provides a computer program product.
  • the computer reads and executes the computer program product, the computer is caused to execute the method in any one of the possible designs in the first aspect, or the first Either of the two possible design methods.
  • an embodiment of the present application provides a communication system including a terminal device and a network device, where the network device may be used to execute the method described in the first aspect or any possible design of the first aspect
  • the terminal device may be configured to execute the method described in the second aspect or any possible design of the second aspect.
  • FIG. 1 is an application scenario in which the PDSCH scheduling instruction uses a DCI in the prior art
  • FIG. 2 is an application scenario in which PDSCH scheduling instructions use two DCIs in the prior art
  • FIG. 3 is a schematic diagram of a network architecture applicable to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of a communication method according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of a detection process of a terminal device applicable to implementation manner 2 in an embodiment of the present application;
  • 6a and 6b are schematic diagrams of a first CRC mask and a second CRC mask provided in an embodiment of the present application;
  • FIG. 7 is a schematic diagram of a detection process of a terminal device applicable to implementation manner 5 in an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 9 is a schematic structural diagram of another network device according to an embodiment of the present application.
  • FIG. 10 is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • FIG. 11 is a schematic structural diagram of another terminal device according to an embodiment of the present application.
  • FIG. 12 is a schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 13 is another schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 14 is another schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 15 is another schematic structural diagram of a communication device according to an embodiment of the present application.
  • FIG. 3 is a schematic diagram of a network architecture applicable to an embodiment of the present application.
  • the network architecture includes a first network device 301, a second network device 302, and a terminal device UE303.
  • the first network device and the second network device are composed of A collaboration set is used to collectively / collaborately transmit data to the terminal device 303.
  • the collaboration set may further include other network devices such as a third network device and a fourth network device, which are not specifically limited in the embodiment of the present application.
  • GSM global system of mobile communication
  • CDMA code division multiple access
  • WCDMA broadband code Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • FDD Frequency Division Duplex
  • TDD time division duplex
  • UMTS universal mobile communication system
  • Terminal equipment including equipment that provides voice and / or data connectivity to the user, for example, may include a handheld device with a wireless connection function, or a processing device connected to a wireless modem.
  • the terminal device can communicate with the core network via a radio access network (RAN) and exchange voice and / or data with the RAN.
  • the terminal equipment may include user equipment (UE), wireless terminal equipment, mobile terminal equipment, subscriber unit, subscriber station, mobile station, mobile station, remote Station (remote station), access point (access point (AP)), remote terminal device (remote terminal), access terminal device (access terminal), user terminal device (user terminal), user agent (user agent), or user Equipment (user device) and so on.
  • a mobile phone or a "cellular" phone
  • a computer with a mobile terminal device a portable, pocket, handheld, computer-built or vehicle-mounted mobile device, a smart wearable device, and the like.
  • PCS personal communication service
  • SIP session initiation protocol
  • WLL wireless local loop
  • PDA personal digital assistants
  • restricted devices such as devices with lower power consumption, devices with limited storage capabilities, or devices with limited computing capabilities.
  • it includes bar code, radio frequency identification (RFID), sensors, global positioning system (GPS), laser scanner, and other information sensing equipment.
  • RFID radio frequency identification
  • GPS global positioning system
  • laser scanner and other information sensing equipment.
  • the terminal device may also be a wearable device.
  • Wearable devices can also be referred to as wearable smart devices. They are the general name for applying wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, gloves, watches, clothing and shoes.
  • a wearable device is a device that is worn directly on the body or is integrated into the user's clothing or accessories. Wearable devices are not only a hardware device, but also powerful functions through software support, data interaction, and cloud interaction.
  • Broad-spectrum wearable smart devices include full-featured, large-sized, full or partial functions that do not rely on smart phones, such as smart watches or smart glasses, and only focus on certain types of application functions, and need to cooperate with other devices such as smart phones Use, such as smart bracelets, smart helmets, smart jewelry, etc. for physical signs monitoring.
  • a network device including, for example, a base station (for example, an access point), may refer to a device in an access network that communicates with a wireless terminal device through one or more cells over an air interface.
  • the network device can be used to convert the received air frame and the Internet Protocol (IP) packet to each other, and serve as a router between the terminal device and the rest of the access network, where the rest of the access network can include an IP network.
  • IP Internet Protocol
  • the network equipment can also coordinate the attribute management of the air interface.
  • the network device may include an evolved base station (NodeB or eNB or e-NodeB, evolutional NodeB) in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the fifth generation (5G) new radio (NR) system, or it can also include the cloud access network (cloud radio access A centralized unit (CU) and a distributed unit (DU) in a network (CloudRAN) system are not limited in the embodiments of the present application.
  • NodeB or eNB or e-NodeB, evolutional NodeB in a long term evolution (LTE) system or an evolved LTE system (LTE-Advanced, LTE-A), or It can also include the next generation node B (gNB) in the fifth generation (5G) new radio (NR) system, or it can also include the cloud access network (cloud radio access A centralized unit (CU) and a distributed unit (DU) in a network (Cloud
  • “Multiple” means two or more. In view of this, in the embodiments of the present application, “multiple” can also be understood as “at least two". "At least two” can be understood as two or more, for example, two, three or more. "At least one” can be understood as one or more, for example, one, two or more. In the same way, the understanding of the description of "multiple” is similar. "And / or” describes the association relationship of the associated objects, and indicates that there can be three kinds of relationships. For example, A and / or B can mean that there are three cases in which A exists alone, A and B exist, and B exists alone. In addition, the character "/”, unless otherwise specified, generally indicates that the related objects are an "or" relationship.
  • FIG. 4 is a schematic flowchart of a communication method according to an embodiment of the present application. Please refer to FIG. 4. The method specifically includes the following steps:
  • Step S401 The first network device generates first indication information; the first indication information is used to indicate a first downlink resource, and whether there is second indication information in a first time unit, where the second indication information is used for Indicating a second downlink resource; the first downlink resource and the second downlink resource are used to carry downlink data;
  • Step S402 the first network device sends the first instruction information to the terminal device within the first time unit;
  • Step S403 The terminal device detects the first instruction information in the first time unit. If the detected first instruction information indicates that the second instruction information does not exist in the first time unit, the terminal device is in Stop detecting the second instruction information within the first time unit.
  • the terminal device may terminate the second instruction in advance Information blind detection process, that is, the number of blind detection times for the second indication information does not need to reach the predefined maximum number of blind detection times, thereby effectively reducing the blind detection complexity of the terminal device, supporting the terminal device for fast PDSCH demodulation, and avoiding the existing In the technology, the technical problem of large power consumption caused by two indication information is always detected blindly.
  • the embodiments of the present application transmit a maximum of two codewords (that is, codewords) according to the protocol. Accordingly, the network device configures the maximum detection of two A DCI is taken as an example for illustration. It should be understood that, as the data processing capabilities of network devices and terminal devices continue to increase, future communication systems may also support the transmission of more codewords. Therefore, in this case, it can be further expanded based on the embodiments of this application to The terminal device can know the number of DCIs to be detected, thereby stopping unnecessary blind DCI detection processes in time, and reducing the detection power consumption of the terminal device.
  • the first network device is any network device in a collaborative set.
  • a network device is used as a base station, and a plurality of base stations are included in the cooperation set as an example.
  • the network device may be a serving base station in the cooperation set, or a cooperative base station in the cooperation set. This embodiment of the present application does not specifically limit this.
  • the first indication information and the second indication information are indication information sent by the first network device within a first time unit and used to indicate downlink resources carrying downlink data.
  • the first indication information may be a first DCI used for downlink data scheduling, and the first DCI is used to indicate a first downlink resource allocated by the first network device to the terminal device, and whether it exists in the first time unit.
  • the second indication information may be a second DCI used for downlink data scheduling, and used to instruct the first network device to allocate a second downlink resource to the terminal device, where the first downlink resource and the second downlink resource are The same time unit is occupied in the time domain, that is, the first time unit.
  • the terminal device uses the first downlink resource and the second downlink resource to transmit and receive downlink data
  • the data transmission on the first downlink resource and the data transmission on the second downlink resource are (or can be (Approximately seen as) happen simultaneously.
  • the first downlink resource and the second downlink resource may also occupy different time units in the time domain.
  • the time units occupied by the first downlink resource and the second downlink resource in the time domain pass the first DCI and the second DCI, respectively.
  • the indicated time domain resource is determined.
  • the first DCI may include at least two codeword information fields, and each of the at least two codeword information fields is used to indicate whether a corresponding codeword is enabled.
  • the second DCI may include at least two codeword information fields, and each codeword information field in the at least two codeword information fields is used to indicate whether a corresponding codeword is enabled.
  • each codeword information field in the first codeword information field and / or the second codeword information field may correspond to one codeword or multiple codewords.
  • one codeword information field corresponds to one codeword
  • the current communication protocol only supports the transmission of the largest codeword.
  • the first codeword information field and / or the second codeword information field can contain multiple Codeword information fields
  • each codeword information field can correspond to a codeword. Therefore, in the embodiment of the present application, one codeword information field corresponds to one codeword, and one DCI includes two codeword information fields as an example for description, which will not be described in detail later.
  • a codeword can be understood as a group of data bits carried on downlink resources indicated by a network device.
  • the network device can use an independent modulation and coding method for the data of each codeword and pass the data in the DCI.
  • the codeword information field indicates. For example, if the first DCI includes two codeword information fields, and the two codeword information fields correspond to two codewords respectively, if both codewords are enabled, it means that the network device is transmitting on the first downlink resource.
  • the downlink data is configured with two independent modulation and coding modes. If only one codeword is enabled, it indicates that the network device has configured a modulation and coding mode for the downlink data transmitted on the first downlink resource.
  • each codeword corresponds to an independent transmission layer, and also corresponds to a maximum transmission layer value. This is because when the number of transmission layers is large, the channel state of each layer of data is greatly different. Using the same modulation and coding method may bring a large performance loss, which requires the use of multiple codewords to transmit a large number of transmission layers.
  • the data may be used to calculate the number of transmission layers.
  • Format 1_1 is a common DCI format used for downlink grant (scheduling PDSCH).
  • the DCI format specifically includes the following fields:
  • ⁇ DCI format indication information 1 bit, used to indicate downlink DCI or uplink DCI;
  • Carrier indicator 0 or 3 bits
  • BWP Bandwidth part
  • N RBG bits indicates that the activated BWP is divided into N RBG bandwidths with a resource block group (RBG) as the granularity, and each bandwidth uses 1 bit to indicate whether to allocate to the UE Receive PDSCH, ie bitmap indication method;
  • RBG resource block group
  • Time domain resource location indication information 0, 1, 2, 3, 4 bits, used to indicate the time domain resource location of the PDSCH;
  • VRB Virtual resource block
  • PRB physical resource block
  • ⁇ PRB bundling size indication 0, 1 bit, used to indicate the size of PRB bundling of PDSCH;
  • Rate matching (rate matching) indication 0, 1, 2 bits, used to indicate the PDSCH resource set for rate matching;
  • Zero power channel state information reference signal (ZP CSI-RS) trigger used to instruct to trigger a ZP CSI-RS resource set for PDSCH to do rate matching;
  • MCS Modulation and coding strategy
  • New data indicator 1 bit, used to indicate whether the PDSCH is new data or retransmitted data
  • New data indication NDI 1 bit, used to indicate whether the data carried by the PDSCH is newly transmitted data or retransmitted data
  • DAI Downlink allocation indicator
  • Scheduling PUCCH transmit power control command (transmission, power control, TPC command): 2 bits, used to indicate PUCCH transmit power adjustment;
  • ⁇ PUCCH resource indication 3 bits, used to indicate the uplink PUCCH resource used by PDSCH-related HARQ feedback;
  • ⁇ PDSCH to HARQ feedback timing indication 0, 1, 2, 3 bits
  • DMRS Demodulation reference signal
  • the DM-S antenna port indication includes an indication of a "CDM group not carrying data", and its indicated values 1, 2, and 3 correspond to the CDM groups ⁇ 0 ⁇ , ⁇ 0, 1 ⁇ , and ⁇ 0, 1, 2 ⁇ , respectively.
  • the "CDM group not carrying data" indicates 1, it means that the CDM group ⁇ 1, 2 ⁇ will carry PDSCH data, the UE needs to receive PDSCH on the corresponding time-frequency resource, and CDM group 0 will not carry PDSCH. Data, the UE does not need to receive the PDSCH on the corresponding time-frequency resources;
  • Transmission configuration indication 0, 3 bits, used to indicate the quasi colocation (QCL) hypothesis information of the PDSCH and the corresponding DMRS and the received beam information;
  • ⁇ SRS request 2, 3 bits, used to indicate triggering of aperiodic SRS transmission
  • CBG Code block group
  • ⁇ DMRS sequence initialization 0, 1 bit
  • Format 1_0 is a compact DCI format for downlink authorization (scheduling PDSCH).
  • the DCI format contains fewer fields than the above format 1_1, and only has the DCI fields necessary for scheduling PDSCH.
  • the DCI format specifically includes the following fields:
  • ⁇ DCI format indication information 1 bit, used to indicate downlink DCI or uplink DCI;
  • Time domain resource location indication information 0, 1, 2, 3, 4 bits
  • VRB Virtual resource block
  • PRB physical resource block
  • Transport Block (TB) 1 For Transport Block (TB) 1:
  • New data indicates NDA: 1 bit
  • TPC command 2 bits
  • ⁇ PUCCH resource indication 3 bits
  • ⁇ PDSCH to HARQ feedback timing indication 0, 1, 2, 3 bits
  • the above format 1_1 contains the modulation and coding strategy MCS field, the new data indication NDI field, and the redundant version RV field of each transmission block.
  • Each transmission block corresponds to a codeword
  • each transmission block corresponds to a group of MCS fields.
  • the NDI field and the RV field are a codeword information field.
  • both the first DCI and the second DCI may adopt the above-mentioned format 1_1.
  • the first DCI and the second DCI both include two codeword information fields.
  • the DCI can be used to indicate the scheduling of one codeword or two codewords, and regardless of whether the DCI is used to schedule one codeword or two codewords, the DCI includes the modulation and coding strategy MCS field and new data indication of two transport blocks NDI field and redundant version RV field.
  • the MCS, NDI, and RV fields corresponding to the two codewords indicate that both codewords are enabled.
  • the MCS, NDI, and RV fields corresponding to one codeword indicate that the codeword is enabled, and the MCS, NDI, and RV fields corresponding to the other codeword indicate that the codeword is not enabled.
  • the first network device may generate a first DCI, and indicate whether a second DCI exists within the first time unit through the first DCI.
  • both the first DCI and the second DCI may be sent by the first network device, corresponding to an application scenario in which a single base station transmits; in another possible implementation manner, the first DCI and the second DCI It can be sent by the first network device and the second network device respectively, corresponding to the application scenario in which the network devices in the collaboration set use the CoMP transmission mode to transmit data to the terminal device.
  • first DCI and the second DCI sent by the first network device as an example, but it should be understood that the embodiments of the present application are not limited thereto.
  • the first time unit may be one or more slots, subframes, or OFDM symbols.
  • the first time unit should be understood as that the first DCI and the second DCI are configured with a detection cycle, and the detection time of each detection cycle can be used as the first time unit.
  • the detection period may be independently configured in the search space of the first DCI and the second DCI, or it may be agreed in advance that the detection period is configured to the same value.
  • the search order of the blind detection search space of the UE by the network device is unknown, for example, when the network device sends two DCIs, the two DCIs can be configured in different search spaces respectively, and the UE can first detect A search space with a smaller index number corresponding to the search space may also first detect a search space with a larger index number corresponding to the search space.
  • each search space corresponds to multiple PDCCH candidates, and the multiple PDCCH candidates belong to two DCIs respectively.
  • the network device detects the multiple PDCCH candidates in the search space for the UE.
  • the detection order is also unknown.
  • the network cannot determine which of the two DCIs in the first time unit will be detected by the UE first.
  • the UE may detect the first DCI first.
  • a second DCI may be detected first. Therefore, the second DCI also needs to indicate that the first DCI exists within the first time unit. That is to say, in the case where the network device in the cooperative set sends two DCIs to the terminal device, each DCI indicates the existence of another DCI to prompt the terminal device to detect two DCIs.
  • the second DCI does not exist in the first time unit, it means that only the first network device in the collaboration set sends the first DCI to the terminal device.
  • the first DCI schedules a codeword it corresponds to a single base station transmission scenario.
  • the data of the two codewords can be sent by the first network device, corresponding to an application scenario transmitted by a single base station, or different codes
  • the word data can be transmitted by the first network device and the second network device in cooperation.
  • Each network device is used to transmit data of one codeword. For example, the first network device sends the first codeword scheduled by the first DCI, and the second network device sends the first codeword.
  • the second codeword scheduled by the second DCI that is, the CoMP transmission mode.
  • DPS Dynamic transmission node switching
  • C-JT Coherent transmission
  • Non-coherent transmission Multiple network devices transmit data for a terminal device at the same time, and the antenna ports of multiple network devices are independently precoded, that is, each network device is independent Select the optimal precoding matrix to perform joint phase and amplitude weighting between the antenna ports of the network device. This mechanism does not require phase calibration of the antennas of multiple network devices;
  • Spatial multiplexing-based transmission (diversity transmission):
  • the above three transmission modes assume that two network devices transmit different data bits, that is, support multi-stream transmission to increase the transmission rate and system capacity, while spatial multiplexing-based transmission
  • the purpose of the mode is to enhance the robustness of data transmission. Therefore, the transmission mode is that two network devices use different transmission methods (such as precoding, power, and beam) to send the same data bits.
  • the terminal device receives two identical data bits. Data stream, the two data streams can be soft-bit merged to improve data demodulation performance.
  • any one of the first DCI and the second DCI indicates that “there is another DCI in the first time unit”.
  • the information may have multiple possible implementations. Several possible implementations are described in detail below.
  • a newly added field in the first DCI can indicate whether there is a second DCI, and the newly added field (Not shown in the above-mentioned formats 1_1 and 1_0) may be 1 bit. For example, when the value of the new field in the first DCI is 1, it indicates that there is a second DCI, and when the value of the new field in the first DCI is 0, it indicates that there is no second DCI.
  • the first network device may send the first DCI to the terminal device within the first time unit; if there is a second DCI, in step S402, the first network device may Send the first DCI and the second DCI to the terminal device within the first time unit.
  • the terminal device can detect DCI on the time-frequency resources occupied by the PDCCH. If the first DCI is the first DCI detected by the terminal device, the terminal device can detect the new field according to the new field in the first DCI. The value of the value determines whether to continue detecting the second DCI. If the value of the newly added field indicates that the second DCI exists, the detection is continued, otherwise the detection is stopped. If the first DCI is the second DCI detected by the terminal device, the terminal device can confirm that the indication carried by the first DCI is "in the first time unit memory" according to the first DCI detected before (ie, the second DCI). In the second DCI ".
  • the second DCI may use the same indication method as the first DCI, that is, the second DCI also includes the above-mentioned newly added field for indicating "the first DCI exists in the first time unit", and is no longer here. To repeat.
  • any DCI in the two DCIs may be used to indicate the information “whether there is a second DCI in the first time unit” by multiplexing the existing fields in the DCI format, so as to avoid The new fields in the current DCI bring additional signaling overhead.
  • the first DCI may include at least two codeword information fields, and the first codeword information field in the at least two codeword information fields is used to indicate whether the corresponding codeword is enabled.
  • the first DCI can be used to indicate that there is no second DCI in the first time unit; when the codes corresponding to the at least two first codeword information fields are When part of the codeword in the word is enabled, the first DCI can be used to indicate the presence of a second DCI within the first time unit.
  • the second DCI is also used to indicate that the first DCI exists in the first time unit, and the second DCI also includes at least two codeword information fields, and the codewords corresponding to the at least two codeword information fields are Part of the codeword is enabled.
  • the first DCI may include two codeword information fields, which are: a codeword information field 1 for indicating a transport block TB1 and a codeword information field 2 for indicating a transport block TB2.
  • the codeword information field 1 may include an MCS field, an NDI field, and an RV field, which are respectively used to indicate the modulation and coding strategy adopted by the codeword corresponding to the codeword information field 1, whether it is newly transmitted data or retransmitted data, and retransmitted data. Encoding. The same is true for the codeword information field 2, which is not repeated here.
  • the first DCI may be used to indicate that the second DCI does not exist within the first time unit.
  • the first network device may send the first DCI to the terminal device.
  • the terminal device can detect the DCI on the time-frequency resources occupied by the PDCCH, and determine that the network device in the cooperative set has only sent one DCI based on the detected first DCI, and then stop blind detection of the second DCI. Process to reduce detection power.
  • the DMRS corresponding to the codeword corresponding to the codeword information field 1 and the codeword information field 2 use the same QCL assumption, and the corresponding corresponding transmission mode is PDSCH transmission with a single base station greater than 4 layers (corresponding to 2 codewords).
  • the terminal device may continue to detect the second DCI by default. If the second DCI is subsequently detected, it is determined that the current transmission mode is the one using two codewords.
  • the corresponding transmission mode is PDSCH transmission with no more than 4 layers (corresponding to a codeword) for a single base station.
  • the second DCI may include at least two codeword information fields, and each codeword information field in the at least two codeword information fields is used to indicate a corresponding Whether the codeword is enabled.
  • the second DCI may be used to indicate that the first DCI does not exist in the first time unit; when the codewords corresponding to the at least two codeword information fields are When part of the codeword is enabled, the second DCI can be used to indicate that the first DCI exists within the first time unit.
  • the second DCI may include two codeword information fields, which are: a codeword information field 3 for indicating a transport block TB1 and a codeword information field 4 for indicating a transport block TB2.
  • the codeword information field 3 may include an MCS field, an NDI field, and an RV field, which are respectively used to indicate the modulation and coding strategy adopted by the codeword corresponding to the codeword information field 3, whether for new or retransmitted data, and retransmitted data. Encoding. The same is true for the codeword information field 4, and details are not described herein again.
  • the second DCI can be used to indicate that the first DCI does not exist within the first time unit; when the codeword information field 1 corresponds When the codeword is enabled and the codeword corresponding to codeword information field 2 is not enabled, the second DCI may be used to indicate that the first DCI exists in the first time unit.
  • the network device will send at least one DCI when scheduling downlink data to the terminal device, and in the embodiment of the present application, it is assumed that the first DCI must exist, and the first network device will send the first DCI within the first time unit.
  • the UE when only part of the codewords in the first DCI are enabled, only part of the codewords in the second DCI are indicated to be enabled, or when only part of the codewords in the first DCI are enabled, only in the second DCI It instructs to enable part of the codeword, so that the first DCI and the second DCI mutually indicate that there is another DCI, and no matter which DCI the UE detects first, it will continue to detect another DCI.
  • both DCIs indicate that only part of the codewords are enabled. If other conditions occur, for example, a DCI detected later indicates that all codewords are enabled, the UE may consider that its detection is incorrect and may terminate Demodulate and decode the data indicated by the two DCIs.
  • the first network device may send the first DCI and the second DCI to the terminal device.
  • the terminal device can detect the DCI on the time-frequency resources occupied by the PDCCH. If the first DCI is the first DCI detected by the terminal device, the terminal device can determine the cooperation concentration based on the detected first DCI. The network device sends two DCIs, and then continues to detect the second DCI. After subsequent detection of the second DCI, it can be determined that the current transmission mode is NC-JT transmission.
  • the terminal device may determine whether the codeword corresponding to the codeword information field is enabled according to the values of the MCS field and the RV field of the codeword information field.
  • the values of the MCS field and the RV field are some specific values, such as the value of the MCS field is 26 and the value of the RV field is 1, it means that the codeword corresponding to the codeword information field is not enabled, and when When the values of the MCS field and the RV field are other values, it indicates that the codeword corresponding to the codeword information field is enabled, and the data corresponding to the codeword is demodulated by using the modulation and coding method indicated by the MCS and RV fields.
  • the detection process of a terminal device can be as shown in FIG. 5, where the nth blind detection (BD) time in FIG. 5 indicates N PDCCH candidates (corresponding to the maximum number of blind detections) included in all search spaces configured for the terminal device. It is the detection of the nth PDCCH candidate in N).
  • a search space includes multiple aggregation levels, and each aggregation level may correspond to multiple PDCCH candidates. Assuming that terminal equipment usually performs serial detection, each blind detection can only detect one PDCCH candidate, and BD1 corresponds to the PDCCH candidate of DCI1, and BD2 corresponds to the PDCCH candidate of DCI2.
  • the terminal device When the terminal device performs the nth When +3 times of PDCCH candidate detection, DCI 2 is successfully detected and both codewords are enabled. At this time, the terminal device does not need to detect the PDCCH candidate (BD 1) corresponding to the subsequent DCI 1; when the terminal device performs the n + 3th time During the detection of PDCCH candidates, DCI 2 was successfully detected and it was determined that 1 codeword is enabled. At this time, the terminal device continues to detect PDCCH candidates (ie, BD 1) corresponding to subsequent DCI 1s.
  • the MCS field, the NDI field, the RV field in the codeword information field, and the DMRS port indication field in the DCI can be used to collectively implement the indication in any one of the two DCIs that " Whether there is another DCI in the first time unit ", so as to avoid the extra signaling overhead caused by adding new fields in the current DCI, and at the same time ensure that the DMRS port indicator field is reused.
  • the flexibility of the DMRS port indication field is not affected when scheduling one or two codewords.
  • the number of DMRS ports and the port number indicated by the DMRS port indication field in the DCI are determined according to the number of enabled codewords indicated by the codeword information field in the DCI.
  • the number of DMRS ports indicated by the DMRS port indication field is greater than 4, when the DCI indicates that the number of enabled codewords is less than or equal to a predefined value
  • the value is 1, for example (assuming the maximum number of enabled codewords is 2), the number of DMRS ports indicated by the DMRS port indication field is 4 or less.
  • the first DCI may include a DMRS port indication field and at least two codeword information fields, where each codeword information field in the at least two codeword information fields is used to indicate a corresponding Whether the codeword is enabled.
  • the DMRS port indication field is used to indicate the port of the demodulation reference signal DMRS corresponding to the data transmitted on the first downlink resource.
  • the first DCI may be used to indicate that a second DCI exists in the first time unit. ;
  • the first DCI may be used to indicate that the second time does not exist within the first time unit DCI;
  • the first DCI may be used to indicate that there is no second DCI in the first time unit.
  • the number of DMRS ports corresponding to the status value of the DMRS port indication field within the first preset range is less than or equal to the first threshold
  • the number of DMRS port indication fields within the second preset range is The number of DMRS ports corresponding to the status value is greater than the first threshold.
  • the specific value of the first threshold value can be specifically set by those skilled in the art according to actual needs, and is not specifically limited herein. Generally, it is considered that when the number of transmission layers is greater than 4, using one codeword for data transmission will bring performance loss, so one possible setting method is to set the first threshold value to 4.
  • the first DCI may include a first DMRS port indication field and two codeword information fields, where the two codeword information fields are: a codeword information field 1 for indicating a transport block TB1 and a In the codeword information field 2 indicating the transport block TB2.
  • the codeword information field 1 may include an MCS field, an NDI field, and an RV field, which are respectively used to indicate the modulation and coding strategy adopted for the codeword corresponding to the codeword information field 1, whether it is newly transmitted data or retransmitted data, and the retransmitted data. Encoding. The same is true for the codeword information field 2, which is not repeated here.
  • the first DMRS port indication field is used to indicate the DMRS port number corresponding to the data transmitted on the first downlink resource, and the number of DMRS ports. The port number indicates the number of transmission layers corresponding to the transmitted data.
  • the first DCI may be used to indicate that the A second DCI exists in a time unit.
  • the first network device may send the first DCI and the second DCI to the terminal device.
  • the terminal device can detect the DCI on the time-frequency resources occupied by the PDCCH. If the first DCI is the first DCI detected by the terminal device, the terminal device can determine the cooperation concentration based on the detected first DCI. The network device sent two DCIs, and it is necessary to continue to detect the second DCI.
  • the corresponding transmission mode is NC-JT transmission using two codewords.
  • the terminal device may determine that the first DCI needs to be detected subsequently, and the corresponding transmission mode is NC-JT transmission using two codewords.
  • the first DCI can be used to indicate that there is no second DCI in the first time unit.
  • the first network device may send the first DCI to the terminal device.
  • the terminal device may detect DCI on the time-frequency resources occupied by the PDCCH, and determine that the network device in the collaborative set has only sent one DCI based on the detected first DCI, thereby stopping an unnecessary blind detection process. The detection power consumption is reduced.
  • the corresponding transmission is a PDSCH transmission with a single base station larger than 4 layers (corresponding to 2 codewords).
  • the first DCI can be used to indicate that there is no second DCI in the first time unit.
  • the first network device may send the first DCI to the terminal device.
  • the terminal device may detect DCI on the time-frequency resources occupied by the PDCCH, and determine that the network device in the collaborative set has only sent one DCI based on the detected first DCI, thereby stopping an unnecessary blind detection process. The detection power consumption is reduced.
  • the corresponding transmission is a PDSCH transmission with no more than 4 layers (corresponding to a codeword) in a single base station.
  • the second DCI may include a DMRS port indication field and at least two codeword information fields, where each codeword information field in the at least two codeword information fields may be used to indicate a corresponding Whether the codeword is enabled, the second DMRS port indication field may be used to indicate a DMRS port corresponding to data transmitted on the second downlink resource.
  • the second DCI may be used to indicate that the first DCI exists in the first time unit. ;
  • the second DCI may be used to indicate that the first time does not exist in the first time unit DCI;
  • the second DCI may be used to indicate that the first DCI does not exist in the first time unit.
  • the number of DMRS ports corresponding to the status value of the DMRS port indication field within the first preset range is less than or equal to the first threshold, and the number of DMRS port indication fields within the second preset range is The number of DMRS ports corresponding to the status value is greater than the first threshold.
  • the second DCI may include two codeword information fields and a second DMRS port indication field, where the two codeword information fields are: a codeword information field 3 for indicating a transport block TB1 and a user code.
  • the codeword information field 4 indicating the transport block TB2.
  • the codeword information field 3 may include an MCS field, an NDI field, and an RV field, which are respectively used to indicate the modulation and coding strategy adopted for the codeword corresponding to the codeword information field 3, whether to be newly transmitted data or retransmitted data, and encoding of the retransmitted data. the way.
  • the second DMRS port indication field is used to indicate the DMRS port number corresponding to the data transmitted on the second downlink resource, and the number of DMRS ports. The port number indicates the number of transmission layers corresponding to the transmitted data.
  • the second DCI may be used to indicate that the A first DCI exists in a time unit.
  • the first network device may send the first DCI and the second DCI to the terminal device.
  • the terminal device can detect the DCI on the time-frequency resources occupied by the PDCCH. If the second DCI is the first DCI detected by the terminal device, the terminal device can determine the cooperation concentration based on the detected second DCI. The network device sent two DCIs, and subsequently needs to continue to detect the first DCI.
  • the corresponding transmission is NC-JT transmission.
  • the terminal device may determine that it needs to continue to detect the second DCI in the future. At this time, the corresponding transmission is NC-JT transmission.
  • the first network device may send the second DCI to the terminal device.
  • the terminal device may detect the DCI on the time-frequency resources occupied by the PDCCH, and determine that the network device in the cooperative set only sends one DCI (that is, the second DCI) according to the detected second DCI, thereby stopping The necessary blind detection process reduces the detection power consumption.
  • the corresponding transmission is a PDSCH transmission with a single base station greater than 4 layers (corresponding to 2 codewords).
  • the second DCI can be used to indicate that the first DCI does not exist within the first time unit.
  • the first network device may send the second DCI to the terminal device.
  • the terminal device may detect the DCI on the time-frequency resources occupied by the PDCCH, and determine that the network device in the cooperative set only sends one DCI (that is, the second DCI) according to the detected second DCI, thereby stopping The necessary blind detection process reduces the detection power consumption.
  • the corresponding transmission mode is PDSCH transmission with no more than 4 layers (corresponding to a codeword).
  • the network device will issue at least one DCI. If a DCI is issued, and the DCI schedules a codeword, it indicates that the scheduled downlink data transmission is a single base station transmission. If two DCIs are issued, or a DCI is issued, but the DCI schedules two codewords, it indicates scheduling.
  • the downlink data transmission may be coordinated transmission by multiple base stations. Therefore, the embodiment of the present application is described from the perspective that the first DCI must exist, but the second DCI may or may not exist. There may be a situation where the "second DCI indicates that the first DCI does not exist in the first time unit", but the above description is for illustration only, and the second DCI may be indicated in the same way as the first DCI. Instructions are similar.
  • a codeword corresponding to a certain codeword information field is enabled is similar to the description in the second implementation, that is, when the MCS field and the RV field in the codeword information field are Some specific values indicate that the codeword corresponding to the codeword information field is not enabled; otherwise, the codeword is enabled and will not be described again here.
  • Table 1 exemplarily shows the meaning of the DMRS port indication field in the embodiment of the present application. Please refer to the following Table 1. Taking the first DCI as an example, when only one codeword is enabled in the codeword corresponding to the codeword information field 1 and the codeword corresponding to the codeword information field 2, you can use the The left half of Table 1 interprets the meaning of the DMRS port indication field. At this time, the DMRS port indicated by the DMRS port indication field corresponds to the DMRS port corresponding to the 1 codeword that is enabled by the first DCI indication. When two codewords are enabled, the meaning of the DMRS port indication field can be interpreted according to the right half of Table 1.
  • the The DMRS port corresponds to the DMRS port corresponding to the two codewords enabled by the first DCI indication; when the status value indicated by the DMRS port indication field is within the second preset range, the DMRS port indicated by the DMRS port indication field corresponds to the first A DCI indicates the DMRS port corresponding to one of the two codewords enabled, and the DMRS port corresponding to the other codeword is indicated by the second indication information, that is, the second DCI.
  • the second DCI also indicates 2 codewords are enabled, and the status value indicated by the DMRS port indication field is within a second preset range, and the DMRS port indicated by the DMRS port indication field corresponds to one of the 2 codewords enabled by the second DCI indication Corresponding DMRS port.
  • the mapping relationship between the codeword and the number of transmission layers can be defined in advance by the protocol.
  • the meaning of the DMRS port indication field is explained by using only one possible example, but the codeword and transmission The mapping relationship between the number of layers is not limited to this.
  • the first preset range of the field value of the DMRS port indication field specifically refers to the range of the value of the DMRS port indication field (that is, the value of the bit field field in Table 1) is [4, 31], a closed interval, including 4 and 31; correspondingly, the second preset range specifically refers to: the value range of the DMRS port indication field is [0, 3], and the closed interval includes 0 and 3.
  • the specific DMRS port information corresponding to the status values 0-31 of this field can be determined in a predefined way and does not necessarily follow the order in the example table, that is, the DMRS port information needs to include the DMRS in the example table
  • the port combination, and the correspondence between the DMRS port combination and the bit field field value can be any predetermined way.
  • Table 1 DMRS port indication table for a maximum of 8 DMRS ports
  • Table 1 corresponds to a DMRS configuration method, that is, the maximum number of DMRS ports supporting DCI indication is 8, that is, the maximum number of data transmission layers is 8.
  • Tables 2 to 4 correspond to other DMRS configuration methods, respectively.
  • Table 2 (2) corresponds to the maximum number of DMRS ports that support the DCI indication is 4, that is, the maximum number of data transmission layers is 4.
  • both the first DCI and the second DCI can contain only one MCS corresponding to a codeword.
  • RV, NDI indication fields when the number of DMRS ports is greater than 2, it indicates that there is no other DCI, for example, the field value is 9,10.
  • the DMRS port indicated by the DMRS port indication field in one DCI is located in the same CDM group.
  • the DMRS port indicated by the field value is the DMRS port corresponding to the DCI-enabled codeword, and the DMRS port corresponding to the other codeword is based on
  • the value of the DMRS port indication field in another DCI is also taken as 0, 1, 2, 5, 6, 8; when the field value is taken as 3, 4, 7, 9-13, the DMRS port indicated by the field value The DMRS port corresponding to one codeword enabled for this DCI, and there is no other DCI.
  • Table 3 corresponds to the maximum number of DMRS ports that support the DCI indication is 6, which means that the maximum number of data transmission layers is 6.
  • the principle of indicating whether another DCI is enabled is similar to the indication method corresponding to Table 1.
  • the right half of the DMRS table A status value of 0-1 indicates that there is no other DCI, and a status value of 2-25 indicates that there is another DCI.
  • the DMRS port indication can be interpreted according to the left half of Table 3. The meaning of the field.
  • the DMRS port indicated by the DMRS port indication field corresponds to the DMRS port corresponding to 1 codeword that is enabled by the first DCI indication.
  • the meaning of the DMRS port indication field can be interpreted according to the right half of Table 3.
  • the The DMRS port corresponds to the DMRS port corresponding to the two codewords enabled by the first DCI indication; when the status value indicated by the DMRS port indication field is within the second preset range, the DMRS port indicated by the DMRS port indication field corresponds to the first A DCI indicates the DMRS port corresponding to one of the two codewords enabled, and the DMRS port corresponding to the other codeword is indicated by the second indication information, that is, the second DCI.
  • the second DCI also indicates 2 codewords are enabled, and the status value indicated by the DMRS port indication field is within a second preset range, and the DMRS port indicated by the DMRS port indication field corresponds to one of the 2 codewords enabled by the second DCI indication Corresponding DMRS port.
  • the first preset range of the field value of the DMRS port indication field specifically refers to the range of the value of the DMRS port indication field (that is, the value of the bit field field in Table 2) is [2, 31], a closed interval, including 2 and 31; correspondingly, the second preset range specifically refers to: the value range of the DMRS port indication field is [0, 1], and the closed interval includes 0 and 1.
  • the specific DMRS port information corresponding to the status values 0-31 of this field can be determined in a predefined way and does not necessarily follow the order in the example table, that is, the DMRS port information needs to include the DMRS in the example table
  • the port combination, and the correspondence between the DMRS port combination and the bit field field value can be any predetermined way.
  • the number of DMRS ports corresponding to the first preset range is greater than 4, and the number of DMRS ports corresponding to the second preset range is less than or equal to 4.
  • Table 4 corresponds to the maximum number of DMRS ports that support the DCI indication is 12, that is, the maximum number of data transmission layers is 12.
  • the principle of indicating whether another DCI is enabled is similar to the corresponding indication method of Table 1.
  • the right half of the DMRS table is 0. -5 indicates that there is no other DCI, and 6-63 indicates that there is another DCI.
  • the DMRS port indication can be interpreted according to the left half of Table 4. The meaning of the field.
  • the DMRS port indicated by the DMRS port indication field corresponds to the DMRS port corresponding to 1 codeword that is enabled by the first DCI indication.
  • the meaning of the DMRS port indication field can be interpreted according to the right half of Table 4.
  • the The DMRS port corresponds to the DMRS port corresponding to the two codewords enabled by the first DCI indication; when the status value indicated by the DMRS port indication field is within the second preset range, the DMRS port indicated by the DMRS port indication field corresponds to the first A DCI indicates the DMRS port corresponding to one of the two codewords enabled, and the DMRS port corresponding to the other codeword is indicated by the second indication information, that is, the second DCI.
  • the second DCI also indicates 2 codewords are enabled, and the status value indicated by the DMRS port indication field is within a second preset range, and the DMRS port indicated by the DMRS port indication field corresponds to one of the 2 codewords enabled by the second DCI indication Corresponding DMRS port.
  • the first preset range of the field value of the DMRS port indication field specifically refers to the range of the value of the DMRS port indication field (that is, the value of the bit field field in Table 2) is [6, 63], the closed interval, including 6 and 63; correspondingly, the second preset range specifically refers to: the value range of the DMRS port indication field is [0, 5], and the closed interval includes 0 and 5.
  • the DMRS port information corresponding to the status values 0-63 of this field can be determined in a predefined way without necessarily adopting the order in the example table, that is, the DMRS port information needs to include the DMRS in the example table
  • the port combination, and the correspondence between the DMRS port combination and the bit field field value can be any predetermined way.
  • the number of DMRS ports corresponding to the first preset range is greater than 4, and the number of DMRS ports corresponding to the second preset range is less than or equal to 4.
  • Table 3 DMRS port indication table for a maximum of 6 DMRS ports
  • Table 4 DMRS port indication table for a maximum of 12 DMRS ports
  • the terminal device can detect the first on the time-frequency resource occupied by the corresponding PDCCH according to the search space configured by the first DCI. DCI. If the first DCI detected by the terminal device precedes the second DCI, after detecting the first DCI, the terminal device may first determine whether to enable the codeword according to the codeword information field 1 and the codeword information field 2 in the first DCI. The number, and then according to the field value of the DMRS port indication field in the first DCI, it is determined whether to continue to detect the second DCI.
  • the terminal device when the first DCI detected by the terminal device first, the MCS and RV fields of the two codeword information fields indicate that the codeword is enabled, and when the field value indicated by the first DMRS port indication field is 0-3, the terminal The device can read the right half of Table 1 and determine that it will not continue to detect the second DCI.
  • the current transmission is a PDSCH transmission with a single base station greater than 4 layers.
  • the scheduling information of the codewords corresponding to the two codeword information fields are changed by the first.
  • the DCI indicates that the DMRS port is also indicated by a field value 0-3 in the right half of the DMRS port indication table in the first DCI.
  • the MCS and RV fields of the two codeword information fields indicate that the codeword is enabled, but when the field value indicated by the DM-RS port indication field is 4-31, the terminal device is readable Take the right half of Table 1 and determine that you need to continue detecting the second DCI.
  • the current transmission is NC-JT transmission, but the field value 4-31 of the DMRS port indication field in the first DCI detected by the terminal device only indicates the DMRS port information of one codeword (that is, the code currently scheduled by the first DCI) Word), the DMRS port information of another codeword is indicated by the DMRS port indication field in the second DCI detected by the terminal device subsequently.
  • the terminal device may determine that there is no second DCI, and Stop the blind detection process for DCI.
  • the transmission at this time is a PDSCH transmission with a single base station less than layer 4.
  • the terminal device can read the left half of Table 1 and determine the DMRS port information corresponding to the enabled 1 codeword according to the DMRS port instruction information.
  • the DM-RS port when one codeword is enabled indicates that there are 31 states, and the state with a field value of 4-31 when two codewords are enabled is used to indicate the DM-RS port of one codeword.
  • the terminal device can determine whether the PDSCH is mapped on the CDM group 1 according to whether the second DCI is detected. When the second DCI is detected, the PDSCH is not mapped on the CDM group 1. When the second DCI is not detected, the PDSCH is mapped on CDM group 1.
  • the current protocol specifies that the DMRS ports in a CDM group have the same quasi-co-location hypothesis QCL, and the same base station sends The DMRS port should have the same QCL assumption, and the DM-RS ports sent by different base stations should have different QCL assumptions, so the above values of 25 and 30 need not be indicated.
  • the indication of "whether there is another DCI" may be carried by a mask of a cyclic redundancy check (CRC) used by the control information bits of each DCI.
  • CRC cyclic redundancy check
  • the first DCI bearer is transmitted on the physical downlink control channel PDCCH.
  • the original control data bits on the PDCCH are first attached with a CRC check bit, and then subjected to radio network temporary identifier (RNTI) scrambling. Then, it is sent to the channel coding module for rate matching, and PDCCH modulation is performed according to specific criteria, such as quadrature phase shift keying (QPSK), and finally mapped to time-frequency resources.
  • RNTI radio network temporary identifier
  • the network device may transmit different meanings to the terminal device by defining the meaning of a CRC bit mask (also referred to as a CRC mask, a scrambling bit, or a scrambling sequence) used in the RNTI scrambling process.
  • a CRC bit mask also referred to as a CRC mask, a scrambling bit, or a scrambling sequence
  • the terminal device can interpret the CRC check bit and determine the instruction information of the network device according to the meaning of the scrambling sequence defined by the network device, so that the information length of the DCI is not affected.
  • the different meanings of the CRC bit mask can make the terminal device and the network device reach an agreement in a predefined way.
  • the terminal device determines through decoding that the mask of the detected CRC bit of the first DCI is the first scrambling sequence (such as ⁇ 0 , 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>), the first DCI can be used to indicate the existence of a second DCI, at this time in the collaboration set Network devices sent two DCIs.
  • the first scrambling sequence such as ⁇ 0 , 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>
  • the terminal device can continue to detect the subsequent second DCI; if the terminal device determines the first DCI detected by decoding
  • the mask of the CRC bits is the second scrambling sequence (such as ⁇ 1,1,1,1,1,1,1,1,1,1,1,1,1,1>)
  • the first DCI can be used to indicate that there is no second DCI.
  • the network devices in the collaboration set only send one DCI (that is, the first DCI). Therefore, the terminal device can determine that there is no second DCI in the future and stop unnecessary. Blind detection process.
  • the first scrambling sequence is ⁇ 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0>
  • the second scrambling sequence ⁇ 1,1,1,1,1,1,1,1,1,1,1,1,1> is just one possible example; in another possible design ,
  • the first scrambling sequence can also be ⁇ 0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1>, and correspondingly, the second scrambling
  • the sequence can also be ⁇ 1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0,1,0>; it should be understood that based on the examples in the embodiments of the present application,
  • the first scrambling sequence and the second scrambling sequence may also have other possible variations or implementations, as long as the indication information corresponding to the different scrambling sequences is agreed in advance by the terminal device and the network device. This is no longer enum
  • the indication of "whether there is another DCI in the first time unit" may be carried through the information format of the DCI, thereby avoiding additional signaling overhead caused by adding new fields in the current DCI.
  • the first DCI may be used to indicate There is no second DCI in the time unit; or, in another possible implementation manner, if the first DCI sent by the first network device meets the second information format, the first DCI may be used to indicate the presence of the first DCI in the first time unit.
  • Second DCI is the format with the least number of bits in the multiple DCI formats used for scheduling downlink data transmission, such as format 1_0, and the second information format is the number of bits in the multiple DCI formats used for scheduling downlink data transmission is greater than The format of the first information format is described.
  • the network device can configure the terminal device to detect a maximum of 2 DCIs through high-level signaling, and will configure the DCI format currently detected by the terminal device. For each search space, the terminal device can detect a maximum of two DCI formats. . Referring to FIG. 7, when the network device configures the terminal device to detect both format 1_0 and format 1_1 at the same time, if the terminal device detects that the first DCI satisfies format 1_0, it may stop detecting the second DCI. This is because DCI format 1_0 is a fallback transmission mode for enhancing robustness.
  • the fallback transmission mode does not support CoMP transmission (multi-layer transmission), so there is no first
  • the second DCI does not need to continue to detect the second DCI. It can directly stop the unnecessary blind detection process, reduce the blind detection complexity and power consumption of the terminal device, support the terminal device for fast PDSCH demodulation, and avoid the DCI. Extra overhead.
  • the foregoing implementation manners 1-5 only take “the first DCI indicates whether there is a second DCI” as an example to describe the information indicating manner. Since the order in which the network device blindly detects the search space of the terminal device is unknown, the second The DCI also needs to indicate whether the first DCI exists. Therefore, the second DCI may be indicated by using the same or similar indication method as the first DCI, which is not specifically limited in this embodiment of the present application.
  • the network device may limit the configuration information of the search space where the two DCIs are located. For example, the DCIs carrying the indication of "whether another DCI exists" in the two DCIs are configured to be sent on a resource with a smaller search space ID. , And the DCI that does not carry the indication of "whether another DCI exists" is configured to be sent on a resource with a larger search space ID. In this way, the terminal device needs to adaptively adopt the blind detection sequence from the search space ID with a smaller ID number to the search space ID with a larger ID number in order.
  • the network device When the network device sends two DCIs, it only needs to be carried in one of the DCIs.
  • the indication of "whether another DCI exists", and the formats of the two DCIs may be different, thereby achieving the same purpose of terminating an unnecessary detection process in advance.
  • one DCI may carry MCS, RV, and NDI fields indicating 2 codewords
  • the other DCI may carry only MCS, RV, and NDI fields indicating 1 codeword.
  • the first network device may send third indication information to indicate the first field in the first DCI and the second field in the second DCI.
  • the first field indicates the same content.
  • the first field is a signaling field included in both the first DCI and the second DCI.
  • the third indication information may be indicated by the network device to the terminal device through high-level signaling before sending the first DCI and the second DCI, and the third indication information may include a field name of the first field Or the corresponding field index value is used to indicate which fields in the existing DCI format 1_1 are the first fields.
  • the first field may include some or all of the fields shown in Table 5 below.
  • the terminal device can perform a DCI decoding check based on these redundant signaling fields to help the terminal device judge the correctness of detection and decoding.
  • field A is a redundant field in DCI.
  • the terminal device After the terminal device detects the first DCI and the second DCI, if the content indicated by each redundant signaling field in the first DCI is determined through decoding, both The content indicated by the redundant signaling field in the second DCI is the same, then the terminal device can determine that the first DCI and the second DCI have been correctly decoded, and the terminal device can receive the PDSCH according to the instructions of the first DCI and the second DCI; If the terminal device determines through decoding that the contents indicated by the field A in the first DCI and the second DCI are different, then the terminal device may determine two DCI decoding errors and terminate the reception of the PDSCH this time.
  • the terminal device can perform DCI fast decoding according to these redundant signaling fields.
  • field B is a redundant field in DCI. After the terminal device decodes and obtains the bit value of field B of one of the two DCIs, the terminal device can ignore the field B when decoding the other DCI. Decoding process.
  • an embodiment of the present application further provides a network device.
  • FIG. 8 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • the network device includes : Processing module 810 and transceiver module 820.
  • the processing module 810 is configured to perform an operation that the network device generates the first instruction information, the second instruction information, or the third instruction information in the foregoing method embodiment; and the transceiver module 820 is configured to execute sending of all information within the first time unit. The operation of the first instruction information or the second instruction information, or the operation of sending the third instruction information.
  • processing module 810 in the embodiment of the present invention may be implemented by a processor or a processor-related circuit component
  • transceiver module 820 may be implemented by a transceiver or a transceiver-related circuit component.
  • FIG. 9 is another schematic structural diagram of a network device provided in an embodiment of the present application.
  • the network device 900 includes a memory 910, a processor 920, and a transceiver 930.
  • the memory 910 stores instructions or programs
  • the processor 920 is configured to execute the instructions or programs stored in the memory 910.
  • the processor 920 is configured to perform operations performed by the processing module 820 in the foregoing embodiment
  • the transceiver 930 is configured to perform operations performed by the transmission and reception module 810 in the foregoing embodiment.
  • the network device 800 or the network device 900 may correspond to the first network device in S401 to S403 in the communication method of the embodiment of the present invention, and each module in the network device 800 or the network device 900 The operations and / or functions are respectively to implement the corresponding processes of the method described in FIG. 4, and for the sake of brevity, they are not repeated here.
  • FIG. 10 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.
  • the terminal device includes a transceiver module 1010 and a processing module. 1020.
  • the transceiver module 1010 is configured to perform an operation that the terminal device receives the first instruction information, the second instruction information, or the third instruction information in the first time unit in the foregoing method embodiment.
  • the processing module 1020 is configured to execute the foregoing method embodiment.
  • the terminal device detects that the first instruction information indicates that the second instruction information does not exist in the first time unit, and stops detecting the second instruction information in the first time unit, specifically how Detect and determine whether the first indication information indicates that the second indication information exists in the first time unit according to the detection result.
  • the processing module 1010 may be implemented by a processor or a processor-related circuit component
  • the transceiver module 1020 may be implemented by a transceiver or a transceiver-related circuit component.
  • FIG. 11 is another schematic structural diagram of a terminal device provided in an embodiment of the present application.
  • the terminal device 1100 includes a memory 1110, a processor 1120, and a transceiver 1130.
  • the memory 1110 stores instructions or programs
  • the processor 1120 is configured to execute the instructions or programs stored in the memory 1110.
  • the processor 1120 is configured to perform the operations performed by the processing module 1020 in the foregoing embodiment
  • the transceiver 1130 is configured to perform the operations performed by the transceiver module 1010 in the foregoing embodiment.
  • terminal device 1000 or the terminal device 1100 may correspond to the terminal device in the communication methods S401 to S403 of the embodiment of the present invention, and the operations of the respective modules in the terminal device 1000 or the terminal device 1100 and /
  • the OR function is to implement the corresponding process of each method in FIG. 4, FIG. 5, and FIG. 7, respectively. For brevity, it will not be repeated here.
  • An embodiment of the present application further provides a communication device, which may be a chip, a network device (such as a base station), a terminal device, a circuit, or other network device.
  • the communication apparatus includes one or more processors, and the one or more processors may implement actions performed by a network device or a terminal device side in the method embodiment shown in FIG. 4.
  • FIG. 12 shows a schematic structural diagram of a network device, for example, a structural schematic diagram of a base station.
  • the base station can be applied to the system shown in FIG. 3, and performs the functions of the network device in the foregoing method embodiment.
  • the base station 1200 may include one or more radio frequency units, such as a remote radio unit (RRU) 1201 and one or more baseband units (BBU) (also known as a digital unit, DU). 1202.
  • RRU 1201 may be referred to as a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and may include at least one antenna 12011 and a radio frequency unit 12012.
  • the RRU 1201 part is mainly used for transmitting and receiving radio frequency signals and converting radio frequency signals and baseband signals, for example, for sending the first instruction information described in the foregoing embodiment to a terminal device.
  • the 1202 part of the BBU is mainly used for baseband processing and controlling base stations.
  • the RRU 1201 and the BBU 1202 may be physically located together or physically separated, that is, a distributed base station.
  • the BBU 1202 is a control center of a base station, and may also be referred to as a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, spreading, and so on.
  • the BBU (Processing Unit) 1202 may be used to control a base station to execute an operation procedure on a network device in the foregoing method embodiment.
  • the BBU 1202 may be composed of one or more boards, and multiple boards may jointly support a single access indication wireless access network (such as an LTE network), or may separately support different access systems. Wireless access network (such as LTE network, 5G network or other networks).
  • the BBU 1202 further includes a memory 12021 and a processor 12022.
  • the memory 12021 is configured to store necessary instructions and data.
  • the memory 5021 stores the correspondence between the codebook index and the precoding matrix in the foregoing embodiment.
  • the processor 12022 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the network device in the foregoing method embodiment.
  • the memory 12021 and the processor 12022 may serve one or more single boards. That is, the memory and processor can be set separately on each board. It is also possible that multiple boards share the same memory and processor. In addition, the necessary circuits can be set on each board.
  • FIG. 13 shows a simplified structural diagram of the terminal device. It is easy to understand and easy to illustrate.
  • the terminal device uses a mobile phone as an example.
  • the terminal device includes a processor, a memory, a radio frequency circuit, an antenna, and an input / output device.
  • the processor is mainly used for processing communication protocols and communication data, controlling terminal devices, executing software programs, and processing data of the software programs.
  • the memory is mainly used for storing software programs and data.
  • the radio frequency circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals.
  • the antenna is mainly used to transmit and receive radio frequency signals in the form of electromagnetic waves.
  • Input / output devices such as a touch screen, a display screen, and a keyboard, are mainly used to receive data input by the user and output data to the user. It should be noted that some types of terminal equipment may not have an input / output device.
  • the processor When data needs to be sent, the processor performs baseband processing on the data to be sent, and then outputs the baseband signal to the radio frequency circuit. After the radio frequency circuit processes the baseband signal, the radio frequency signal is sent out through the antenna in the form of electromagnetic waves.
  • the RF circuit receives the RF signal through the antenna, converts the RF signal into a baseband signal, and outputs the baseband signal to the processor.
  • the processor converts the baseband signal into data and processes the data.
  • FIG. 13 In an actual terminal equipment product, there may be one or more processors and one or more memories.
  • the memory may also be referred to as a storage medium or a storage device.
  • the memory may be set independently of the processor or integrated with the processor, which is not limited in the embodiment of the present application.
  • an antenna and a radio frequency circuit having a transmitting and receiving function may be regarded as a transmitting and receiving unit of a terminal device, and a processor having a processing function may be regarded as a processing unit of the terminal device.
  • the terminal device includes a transceiver unit 1310 and a processing unit 1320.
  • the transceiver unit may also be referred to as a transceiver, a transceiver, a transceiver device, and the like.
  • the processing unit may also be called a processor, a processing single board, a processing module, a processing device, and the like.
  • the device for implementing the receiving function in the transceiver unit 1310 may be regarded as a receiving unit, and the device for implementing the transmitting function in the transceiver unit 1310 may be regarded as a transmitting unit, that is, the transceiver unit 1310 includes a receiving unit and a transmitting unit.
  • the transceiver unit may also be called a transceiver, a transceiver, or a transceiver circuit.
  • the receiving unit may also be called a receiver, a receiver, or a receiving circuit.
  • the transmitting unit may also be called a transmitter, a transmitter, or a transmitting circuit.
  • transceiver unit 1310 is configured to perform the sending and receiving operations on the terminal device side in the foregoing method embodiment
  • processing unit 1320 is configured to perform operations other than the transceiver operation on the terminal device in the foregoing method embodiment.
  • the transceiver unit 1310 is configured to perform a sending operation on the terminal device side in FIG. 4, and / or the transceiver unit 1310 is further configured to perform other transceiver steps on the terminal device side in the embodiments of the present application.
  • the processing unit 1320 is configured to execute step S401 in FIG. 4, and / or the processing unit 1320 is further configured to execute other processing steps on the terminal device side in the embodiment of the present application.
  • the chip When the communication device is a chip, the chip includes a transceiver unit and a processing unit.
  • the transceiver unit may be an input / output circuit or a communication interface;
  • the processing unit is a processor or a microprocessor or an integrated circuit integrated on the chip.
  • the communication device in this embodiment is a terminal device
  • the device may perform functions similar to the processor 1120 in FIG. 11.
  • the device includes a processor 1410, a transmitting data processor 1420, and a receiving data processor 1430.
  • the processing module 1020 in the above embodiment may be the processor 1410 in FIG. 14 and perform corresponding functions.
  • the transceiver module 720 in the above embodiment may be the sending data processor 1420 and / or the receiving data processor 1430 in FIG. 14.
  • a channel encoder and a channel decoder are shown in FIG. 14, it can be understood that these modules do not constitute a restrictive description of this embodiment, but are only schematic.
  • FIG. 15 shows another form of this embodiment.
  • the processing device 1500 includes modules such as a modulation subsystem, a central processing subsystem, and a peripheral subsystem.
  • the communication device in this embodiment may serve as a modulation subsystem therein.
  • the modulation subsystem may include a processor 1503 and an interface 1504.
  • the processor 1503 performs the functions of the processing module 1020, and the interface 1504 performs the functions of the transceiver module 1010.
  • the modulation subsystem includes a memory 1506, a processor 1503, and a program stored on the memory 1506 and executable on the processor.
  • the terminal device side in the foregoing method embodiment is implemented.
  • Methods It should be noted that the memory 1506 may be non-volatile or volatile, and its location may be located inside the modulation subsystem or in the processing device 1500, as long as the memory 1506 can be connected to the memory 1506.
  • the processor 1503 is sufficient.
  • An embodiment of the present application further provides a computer-readable storage medium, where the computer-readable instructions are stored in the computer storage medium, and when the computer reads and executes the computer-readable instructions, the computer is caused to execute any one of the foregoing method embodiments Method on the network device side.
  • An embodiment of the present application provides a computer program product.
  • the computer reads and executes the computer program product, the computer is caused to execute the method on the network device side in any one of the foregoing method embodiments.
  • An embodiment of the present application provides a chip that is connected to a memory and is used to read and execute a software program stored in the memory to implement the method on the network device side in any one of the foregoing method embodiments.
  • An embodiment of the present application provides a computer-readable storage medium, which stores instructions thereon, and when the instructions are executed, the method on the terminal device side in the foregoing method embodiment is executed.
  • the embodiment of the present application provides a computer program product containing instructions, and when the instructions are executed, the method on the terminal device side in the foregoing method embodiment is executed.
  • An embodiment of the present application provides a chip that is connected to a memory and is configured to read and execute a software program stored in the memory to implement the method on the terminal device side in any one of the foregoing method embodiments.
  • An embodiment of the present application provides a communication system.
  • the system includes a terminal device and a network device.
  • the terminal device may be used to execute the method on the terminal device side in any one of the foregoing method embodiments, and the network device may be used to execute any of the foregoing method embodiments. Method on the network device side.
  • processors mentioned in the embodiments of the present application may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSPs), and application-specific integrated circuits (DSPs).
  • DSPs digital signal processors
  • DSPs application-specific integrated circuits
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • a general-purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
  • the memory mentioned in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (erasable PROM, EPROM), electrical memory Erase programmable read-only memory (EPROM, EEPROM) or flash memory.
  • the volatile memory may be a random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • DRAM dynamic random access memory
  • SDRAM synchronous dynamic random access memory
  • double SDRAM double SDRAM
  • DDR SDRAM double data rate synchronous dynamic random access memory
  • enhanced SDRAM enhanced SDRAM
  • SLDRAM synchronous connection dynamic random access memory
  • direct RAMbus RAM direct RAMbus RAM
  • the processor is a general-purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, or discrete hardware component
  • the memory memory module
  • memory described herein is intended to include, but is not limited to, these and any other suitable types of memory.
  • the size of the sequence numbers of the above processes does not mean the order of execution.
  • the execution order of each process should be determined by its function and internal logic, and should not deal with the embodiments of the present invention.
  • the implementation process constitutes any limitation.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of this application is essentially a part that contributes to the existing technology or a part of the technical solution can be embodied in the form of a software product.
  • the computer software product is stored in a storage medium, including Several instructions are used to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.
  • the aforementioned storage media include: U disks, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks or compact discs, and other media that can store program codes .

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de communication. Ledit procédé comprend les étapes suivantes : un premier dispositif de réseau génère des premières informations d'indication, les premières informations d'indication étant utilisées pour indiquer une première ressource de liaison descendante et si des secondes informations d'indication existent dans une première unité de temps, les secondes informations d'indication étant utilisées pour indiquer une seconde ressource de liaison descendante ; la première ressource de liaison descendante et la seconde ressource de liaison descendante étant utilisées pour transporter des données de liaison descendante ; et le premier dispositif de réseau envoie les premières informations d'indication à l'intérieur de la première unité de temps. Au fur et à mesure que les premières informations d'indication peuvent être utilisées pour indiquer si des secondes informations d'indication existent, si un équipement utilisateur (UE) a détecté des premières informations d'indication dans la première unité de temps et les premières informations d'indication indiquent qu'aucune seconde information d'indication n'existe dans la première unité de temps, alors l'UE peut terminer, à l'avance, le processus de détection aveugle pour les secondes informations d'indication, réduisant ainsi efficacement la complexité de détection aveugle de l'UE, prenant en charge l'UE pour effectuer une démodulation PDSCH rapide, et éviter le problème technique dans l'état de la technique de consommation d'énergie élevée en réalisant toujours une détection aveugle de deux informations d'indication.
PCT/CN2019/105777 2018-09-14 2019-09-12 Procédé et appareil de communication WO2020052666A1 (fr)

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CN201980060138.1A CN112703696A (zh) 2018-09-14 2019-09-12 一种通信方法及装置
EP19858801.4A EP3846370B1 (fr) 2018-09-14 2019-09-12 Procédé et appareil de communication
US17/200,359 US11889513B2 (en) 2018-09-14 2021-03-12 Communication method and apparatus

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CN201811072500.0 2018-09-14

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CN112703696A (zh) 2021-04-23
CN110912656B (zh) 2021-02-26
EP3846370A1 (fr) 2021-07-07
US20210204260A1 (en) 2021-07-01
EP3846370B1 (fr) 2023-06-07
EP3846370A4 (fr) 2021-11-03
US11889513B2 (en) 2024-01-30

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